We are on the cusp of the sixth mass extinction, as estimated the event to be occurring within 2200 years. Scientists have evidences supporting this statement with the extinction rates and magnitudes, and comparing the present conditions to the past “Big Five”—the previous five mass extinction events. Mass extinction is generally known as the forever disappearance of 75% of lives in the globe, therefore species lost is the main driver of such extinction events. With the current high extinction rates and increasing trend of extinction magnitudes, the sixth mass extinction is expected. Such event is mainly due to human impacts: pollution, over extracting of resources, invasion of non-native species, leading to abnormal changes in the Earth system, for instant causing a rapid and anthropogenic increase in atmospheric carbon dioxide level or coextinction of species. With the current situation, the sixth mass extinction might be similar to the Permian mass extinction event, the most disastrous in the past 540 million years. Human may also face extinction, expecting a rapid decrease in human population within several decades.
As titled: Are We On The Cusp Of The Sixth Mass Extinction Event? Yes, we are indeed, as we, here defined as all the lives on the Earth at the moment. And it is estimated that the event may occur as fast as 240-540 years (Barnosky et al., 2011). Mass extinction is times when the Earth loses more than three-quarters of its species in a geologically short interval (Barnosky et al., 2011). In addition, according to the Oxford Dictionary of Geology and Earth Sciences edited by Michael Allaby (2013), mass extinction is defined as the Earth has been taken place environmental catastrophe, removes many gr...
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...h mass extinction of animals, Science, 331, 6021:1119-1120
Barnosky, A.D.; Matzke, N.; Tomiya, S.; Wogan, G. O. U.; Swartz, B; Quental, T. B; Marshall, C.; McGuire, J. L.; Lindsey, E. L.; Maguire, K. C; Mersey, B.; Ferrer, E. A.. (2011), Has the Earth’s sixth mass extinction already arrived? , Nature, 471: 51-57
Dunn, R. R; Harris, N. C; Colwell, R. K; Koh, L. P; Sodhi, N. S (2009), The sixth mass coextinction: are most endangered species parasites and mutualists?, Proceddings Of The Royal Society B, 276: 3037-3045
Feulner, G. (2009), Climate Modelling of Mass-Extinction Events: A Review, Int. J. Astrobiology, 8: 207-212.
Haamble, C; Henderson. M. R (2011), Extinction rates, extinction-prone habitats, and indicator groups in Britain and at large scales, Biological Conservation, 144: 713-721
Jenkins, M. (2003), Prospect for Biodiversity, Science, 302: 1175-1177
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- As titled: Are We On The Cusp Of The Sixth Mass Extinction Event. Yes, we are indeed, as we, here defined as all the lives on the Earth at the moment. Mass extinction is times when the Earth loses more than three-quarters of its species in a geologically short interval (Barnosky et al., 2011). In addition, according to the Oxford Dictionary of Geology and Earth Sciences edited by Michael Allaby (2013), mass extinction is defined as the Earth has been taken place environmental catastrophe, removes many groups from environment from record and not replaced, and ecosystems collapse.... [tags: environmental catastrophe, Geology]
608 words (1.7 pages)
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718 words (2.1 pages)
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- Humans are very quickly dominating the globe. Today, the human population is around 7 billion people. Humans are populating at a rate of almost 220,000 per day. Humans are rapidly heading towards Earth’s carrying capacity. Earth has gone through five fully major extinctions before. We currently are in the process of Earth’s sixth mass extinction. This mass extinction is closely related in severity to the extinction of the dinosaurs. Earth’s extinctions are broken into three different areas. The first area was the large number of animals caught by hunter-gathers.... [tags: World population, Overpopulation, Human]
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- Wildlife has been living alongside man for as long as our species has been a part of this world, and the wildlife has even been here longer. You’d think that with man and animal coexisting in each other’s presence we’d respect the wild species that we have now a lot more than we do. Many people, whether they’re aware or not, are slaughtering animals all the way to extinction, and there are definitely more ways than one that humans are partaking in the extinction of endangered animals. We have to clean up our act before it’s too late for these animals, including us.... [tags: Extinction, Endangered species, Plant]
1257 words (3.6 pages)
- ABSTRACT Several mass extinctions have occurred during the Earth’s history. The Cretaceous – Tertiary Boundary (K-T) Extinction caused the loss of at least three-quarters of all species known at that time including the dinosaurs. The cause of this mass extinction is a controversial subject among scientists but the fossil evidence of it’s occurrence is abundant. INTRODUCTION The K-T Extinction occurred 65 million years ago. Many species perished in that extinction. Today evidence for this extinction can be seen in the fossil record.... [tags: K-T Extinction]
2446 words (7 pages)
- The History of Earth's Mass Extinctions The four billion year history of earth has witnessed five mass extinctions, and some scientists believe that we are on the verge of the sixth.1 If we are in the midst of the next mass extinction, we are in the very early stages of an evolving, and escalating process. The most recent, or fifth mass of the extinctions occurred 65 million years ago at the boundary between the Cretaceous and Tertiary periods. Images of an asteroid colliding with the planet, decimating the dinosaur population have been in circulation since the early 80’s.2 Being the most recent mass extinction, thousands of scientists around the world have investigated it, and el... [tags: Anthropology Essays Paleontology Papers]
1621 words (4.6 pages)